Dictionary entry

καθέδρα

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

καθ-έδρα, -ας, ἡ

(< κατά, + ἔδρα, a seat), [in LXX for מוֹשָׁב and cogn. forms;]

a chair, seat: Mt 21:12, Mk 11:15; of teachers, Mt 23:2.†